273 CDP Block Question
 

Ok you Dodge boys...
Is the 64 to 67 273 block drilled in the lifter passages to support hydraulic lifters. I see where it went to hyd in 68

Re: 273 CDP Block Question
 

Not in my '65 block.

Re: 273 CDP Block Question
 

Something about the 1964 (only) 273 block. Deck angles are different? Intake manifold won't interchange due to this. Check with somebody more knowledgeable if you have a 1964 block.

Re: 273 CDP Block Question
 

You have the large paassages running along the lifter bank and the one passage feeding it from the mains........... As long as they are the same sizes as the later hyd blocks your good to go.................. I'm betting they are.........

Re: 273 CDP Block Question
 

Back in the early 70`s I owned a 65 Valiant Signet, with a 235HP 273 4 speed. A buddy sold me an Edelbrock D4B intake, and I remember having to oval out the mounting bolt holes to make the bolts go in. I think the angle of the intake bolts were different in 64 and 65, maybe somebody more familiar will chime in. As for hydraulic lifters , mine had solids, and I had thought that all 273s did, even the 2 barrels. I could be wrong.

Re: 273 CDP Block Question
 

The pre 1966 273 heads have 5/16 bolt holes for the intake. After 1966 they went to 3/8 like all other small block mopars. That is why you had to oblong the holes in the early manifold you were trying to use.

Re: 273 CDP Block Question
 

I've never worked on a 273, but I've seen several forum discussions that mention a different bolt angle as well on the earliest years. (64-65-(66?)) i.e: Edelbrock D4B = early, Edelbrock LD4B = later.

Re: 273 CDP Block Question
 

Can you post a picture of the lifter bores?

Re: 273 CDP Block Question
 

Don't have a block in the shop, Comp Cams asked me, I didn't know so I'm asking the forum...
All you others focus, this question is about oil supply to the lifter bores... nothing else

Re: 273 CDP Block Question
 

Well if you are wanting to run a hydraulic cam in a early 273 you could drill into the oil galley if the block does not already feed the lifters, Mopar sells a jig to do this for the R series blocks. Since you don't have the block in front of you it's hard to say though.
I would have assumed they all come machined to oil the lifters but since I've never taken one apart that's just a assumption,lol. I usually just steal the rockers and pushrod's off of them and send the rest to scrap.

Re: 273 CDP Block Question
 

Thanks, Phill... I am familiar with the R block and are you telling me it has the passage front to rear like on the opposite side that feeds the mains? and the lifter bores could be drilled to the passages to feed the lifters?

Re: 273 CDP Block Question
 

I really would have to see the block in question since I have never tore a 273 all the way down. My R block does not oil the lifters but I have seen that Mopar sells a jig to drill into the oil galleys to allow them to. The driver side galley is fed oil from the front main via the passenger side galley. Paul Wong or Ron Ortiz probably have much more experience with a 273 block.
Are you wanting to use a hydraulic cam? Is this for a stocker build or something else?

Re: 273 CDP Block Question
 

As close as I can get is I did a 65 273 had same oil galley as any other small block mopar
It would have to have a completely different oil system to not oil lifters common sbm has galley on right side that cuts into lifter bores and has holes on bottom of galley that goes to each main.
I think the easiest and most accurate way to answer this question is to have comp tell customer if engine is assm. to put primer on it and see if oil comes into lifter bore @ rear then be sure each lifter bore has oil passage.
If engine is apart track oil galleys and see if oil has passage to get there.

Mike Taylor 3601

Re: 273 CDP Block Question
 

Thanks for the response Phillip, I now have the info I needed. Thanks to all that looked